As part of the construction of a new lock system on the Tennessee River, the U. S. Army Corps of Engineers has designed a large temporary coffer system, which allowed A. H. Beck to work approximately 50 feet below the adjacent river elevation. A. H. Beck worked with Heeter Geotechnical Construction to excavate 45 shafts, measuring 8 feet in diameter, into the rock that will then be used as large anchor blocks for a tie-back system for the permanent lock walls. The drilling equipment was hoisted into the excavation for work, and A. H. Beck used a combination of down-the-hole hammers and conventional rock tools for the shaft construction.
GENERAL CONTRACTOR: Heeter Geotechnical Construction Inc.
OWNER: Tennessee Valley Authority
OVERSEER: U.S. Army Corps of Engineers